Moroso Phenolic 1/2" 4-Hole Carburetor Spacer - Fits Holley 4150/4160 Bolt Pattern - 4-Hole Plenum Design w/ 1.75" Diameter Bores Helper Springs a brass Nomex-backed zipper with

a brass Nomex-backed zipper with a double overlap for a secure front opening

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Moroso Phenolic 1/2" 4-Hole Carburetor Spacer - Fits Holley 4150/4160 Bolt Pattern - 4-Hole Plenum Design w/ 1.75" Diameter Bores Helper Springs a brass Nomex-backed zipper withAdvanced phenolic compounds are specially formulated to reduce heat conductivity 10 times greater than aluminum Reducing fuel temperature inside the carburetor results in a denser, more powerful fuel charge to the manifold Insulating phenolic spacers come pre drilled for alignment pins and include all mounting hardware Gaskets not included Moroso Performance Products is one of the worlds most respected suppliers of automotive equipment for racing and